(function flexible(window, document) {
    var docEl = document.documentElement;
    var dpr = window.devicePixelRatio || 1;

    // adjust body font size
    function setBodyFontSize() {
        if (document.body) {
        } else {
            document.addEventListener("DOMContentLoaded", setBodyFontSize);
        }
    }

    setBodyFontSize();

    // set 1rem = viewWidth / 10
    function setRemUnit() {
        var rem = docEl.clientWidth / 7.5;
        docEl.style.fontSize = rem + "px";
    }

    setRemUnit();

    // reset rem unit on page resize
    window.addEventListener("resize", setRemUnit);
    window.addEventListener("pageshow", function (e) {
        if (e.persisted) {
            setRemUnit();
        }
    });

    // detect 0.5px supports
    if (dpr >= 2) {
        var fakeBody = document.createElement("body");
        var testElement = document.createElement("div");
        testElement.style.border = ".5px solid transparent";
        fakeBody.appendChild(testElement);
        docEl.appendChild(fakeBody);
        if (testElement.offsetHeight === 1) {
            docEl.classList.add("hairlines");
        }
        docEl.removeChild(fakeBody);
    }
})(window, document);

function AndroidWeixinFont() {  //android禁止微信浏览器调整字体大小
    if (typeof WeixinJSBridge == "object" && typeof WeixinJSBridge.invoke == "function") {
        handleFontSize();
    } else {
        if (document.addEventListener) {
            document.addEventListener("WeixinJSBridgeReady", handleFontSize, false);
        } else if (document.attachEvent) {
            document.attachEvent("WeixinJSBridgeReady", handleFontSize);
            document.attachEvent("onWeixinJSBridgeReady", handleFontSize);
        }
    }
}
function handleFontSize() {
    // 设置网页字体为默认大小
    WeixinJSBridge.invoke('setFontSizeCallback', {'fontSize': 0});
    // 重写设置网页字体大小的事件
    WeixinJSBridge.on('menu:setfont', function () {
        WeixinJSBridge.invoke('setFontSizeCallback', {'fontSize': 0});
    });
}